CN1827301A - Particle shaping method and device thereof - Google Patents
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- CN1827301A CN1827301A CN 200610011610 CN200610011610A CN1827301A CN 1827301 A CN1827301 A CN 1827301A CN 200610011610 CN200610011610 CN 200610011610 CN 200610011610 A CN200610011610 A CN 200610011610A CN 1827301 A CN1827301 A CN 1827301A
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Abstract
The invention relates to a particle shaping method and relative device, belonging to the powder further processing technique of material engineering. The invention is characterized in that: via the fine particle shaping system, using mechanical impact to mill and shape the powder particle, while the processed powder material carried by high-speed airflow is fed into the shaping processor; inside the main machine, by the quick impact of high-speed rotational rotor and blades, the material is separated with impacted by rotor and high-speed airflow, and rubbed and sheared between themselves, to be shaped while the edge and angle are finished; the material can be processed into ball shape with smaller length-diameter ratio and high vibrated density. The invention can grade the processed material to attain the products in different graininess and realize the high additive valves of different powder materials.
Description
Technical field
The present invention relates to a kind of method and device thereof of particle shaping,, belong to the powder deep processing treatment technology in Materials Science and Engineering field especially for the dry process method of powder material.
Background technology
Fast development along with the material industry new and high technology, powder is as special material form, bringing into play more and more important effect, different industries is not only to composition, purity, granularity, the size distribution of powder material, and grain shape, surface topography, powder fluidity and bulk density etc. have also been proposed more and more harsher requirement.Therefore, in view of the feature of powder material, should from microcosmic, carry out the shaping processing to irregular particle.
1. the used negative material of battery industry---native graphite powder
People's zinc-manganse dioxide dry cell that mostly is used in everyday, invented the history in existing more than 100 year so far from 1868, after this running down of battery is rotted, part mercury becomes mercuryvapour, be deposited on the atmosphere bottom, a part is infiltrated in the soil and is absorbed by crop, also has part mercury to dissolve in the water, the direct harmful to human of all these mercury causes environmental pollution.China produces zinc-manganse dioxide dry cell＞10,000,000,000 per year, and only contained mercury chloride is amounted to into pure mercury and surpassed 50 tons [graphite application significant .http in battery production: //www.chinanmm.com/page/fkyy/shimo/sml.btm] in the waste battery.For this reason, in recent years, states such as Japan and the United States, Europe have announced to forbid having the production and the import of mercury cell, and open up green alkaline Mn cell energetically.The positive electrode material of alkaline Mn cell is by electrolysis MnO
2Particle and graphite granule mixture constitute, and adding graphite powder is in order to strengthen the electric conductivity between the MnO2 grain.Along with homemade battery to the restriction of mercury content and the requirement of low mercuration, the native graphite powder is as the high-quality conductive material of the low mercury of preparation, mercury-free battery, obtained synchronized development with China's " green " alkaline Mn cell.
The native graphite good conductivity, the degree of crystallinity height has good layer structure, be fit to the embedding of lithium---take off embedding, form lithium---compound between graphite layers Li-GIC, charge/discharge capacity can reach more than the 300mAh/g, efficiency for charge-discharge is more than 90%, and irreversible capacity is lower than 50mAh/g.Lithium takes off embedding reaction and occurs between 0～0.25V (vs Li/Li+) in graphite, have favorable charge-discharge current potential platform, can with the positive electrode LiCoO that the lithium source is provided
2, LiNiO
2, LiMn
2O
4Etc. coupling, the battery average output voltage height of composition, be the maximum negative material of present lithium ion battery applications [the bright Kun of Guo, Xu Hui. lithium ion battery [M], publishing house of Central South University, 2002].But it is poor that graphite also exists with the compatibility of solvent, the shortcoming that high power charging-discharging ability is low.
Being used as the desirable negative material of lithium ion battery on the market is middle phase graphite microballoon, is electrographite, and coal tar asphalt is through 2800 ℃ of high-temperature process, and this graphite microballoon has good storage lithium structure, but the cost of graphite microballoon is higher.According to the literature, as lithium ion battery negative material, native graphite has more superior performance than middle phase graphite microballoon.[Zheng Honghe. Zhang Hucheng. Gao Shuyan. the compatibility [J] of middle phase graphite microballoon and liquid nonaqueous electrolyte. He'nan Normal University's journal (natural science edition), 31 (1), 2003:127-129; Quan Wuchong, Wu Chengmo, Li Qiyong etc., spherical carbon and preparation method thereof [P], patent 1461283,2002; Ma Zi-Feng; Yuan Xiao-Zi; Li Dan et al.Structural and electrochemicalcharacterization of carbonaceous mesophase spherule anode material for rechargeablelithium batteries[J], Electrochemistry Communications.4 (2), 2002:188-192].
Graphite is the high-quality electrode material of preparation high performance lithium ion battery, requires the graphite powder to have narrow size distribution, big tap density.The applicant utilizes the subparticle orthopedic systems that the shaping process of crystalline flake graphite and micro crystal graphite has been carried out research in depth.Under the support of the western scientific and technological action plan project of the Ministry of Science and Technology, researched and developed the preparation technology of high performance lithium ion battery with the composite stone ink powder, identified by the Ministry of Education and checked and accepted that technical merit is international advanced.This project is raw material with the native graphite, and manufacturing procedure is made up of pulverizing, classification, shaping, surface coating etc., and equipment all domesticizes.
2. the used metal material of powder metallurgy industry---titanium valve, copper reduction and reduced iron powder
(1) titanium valve
Titanium or titanium alloy has premium properties such as density is low, specific strength is high, corrosion resistance is good, hear resistance is high, no magnetic, good welding performance, can be widely used in fields such as Aero-Space, automobile, bioengineering, wrist-watch, sports goods, environmental protection.But the machinability of titanium or titanium alloy is poor, make relatively difficulty [F.H.Froes.Powder Injection Molding (PIM) of Titanium Alloys-Ripe For Expansion.Materials Technology of complicated shape part, 2000,15 (4): 295～299].The key issue of titanium or titanium alloy PM technique is the control of powder cost and interstitial element content.Hydrogenation dehydrogenation (HDH) titanium valve cost is low, but out-of-shape, mobile poor, and the oxygen content height, be difficult to satisfy the accurate requirement of injection moulding spare.The shape of gas atomized titanium powder is subsphaeroidal, good fluidity substantially, oxygen content is low, but cost height [Schwanke CM, Menegotto JC, Gomes RM, et al.Commercial pure titanium powders obtained by hydrogenembrittlement.KEY ENGINEERING MATERIALS, 2001,189-1:264～270].Based on above background, this paper obtains low-cost, near spherical and mobile titanium valve preferably, to improve its formability and product properties by the HDH titanium valve is put in order spheroidising.
(2) copper powder
Granule reinforced copper base composite material is because with low cost, isotropism, elevated temperature strength height, high-temperature stability are good, the excellent properties of electric-conductivity heat-conductivity high, and can overcome exist in the fibre reinforced composites production process inhomogeneous, fiber and shortcoming such as fiber is in contact with one another, reaction zone is excessive, thereby caused that people more and more pay attention to such as fibre damage, microstructure.In recent years, the development of superfine powder, nano-powder technology has also further promoted the development of granule reinforced copper base composite material.Have comprehensive physics such as good thermal conductivity, electric conductivity, corrosion resistance, zygosity, machinability, mechanical property just because of copper and copper-based material, and it is moderate, so copper and alloy thereof are very extensive as functional material purposes in electronics, electrical equipment industry, electric power, instrument and military project such as conduction, heat conduction, it is one of indispensable basic material, in national economy, occupy extremely significant status, obtained using widely.Though fine copper has high electric conductivity, thermal conductivity, good resistance to corrosion, and be easy to process, but its yield strength is lower, the electric conductivity of existing trade mark copper alloy is difficult to take into account with its intensity and high-temperature behavior, can not satisfy new and high technologies such as space flight, aviation, microelectronics comprehensively and develop rapidly and upgrade instructions for use to its combination property.Application to copper and Cu-base composites thereof now generally requires and can keep high electrical and thermal conductivity under room temperature and high temperature, high yield strength, good non-deformability, and satisfied processing characteristics and rational cost.So development and Application high strength, combarloy sill are necessary.The applicant with a certain proportion of electrolytic copper powder and aluminium oxide powder after ball mill fully mixes, utilizing the subparticle orthopedic systems to carry out spheroidization again handles, low cost, nearly spherical and mobile mixed powder have preferably been obtained, the formability and product properties (the WANG Fu-Xiang of granule reinforced copper base composite material have been improved effectively, GAI Guo-Sheng, JIA Cheng-Chang, Fabrication and Characteristics of Al
2O
3/ Cu Composite Particles byMA﹠amp; PCS.4th China International Conference on High-Performance Ceramics (CICC-4) will be at " Key Engineering Materials ".
(3) iron powder
Reduced iron powder is the basic material of powder metallurgy, it is wide that it uses area, consumption is big, is mainly used in industries such as automobile, motorcycle, agricultural machinery, machinery, welding, flame cutting, household electrical appliances, chemical industry, space flight, electronics, office equipment, food, medicine, water treatment, and is of many uses.Produce 20000 tons of reduced iron powders per year as Shanxi Ya Rui company, 80% above reduced iron powder is applied to parts production.Along with the fast development of national economy sustained and rapid development, particularly automobile, motorcycle, household electric appliances, promoted the development of China's powder metallurgy industry.Not only require reduced iron powder to have high-purity, low impurity, and require compressibility and good moldability, and the compressibility of reduced iron powder and mouldability and its shape there are direct relation.The reduced iron powder that the applicant utilizes the subparticle orthopedic systems that the huge prosperous making in Pingding County, Shanxi Co., Ltd is used for sintered metal product, welding rod, flame cutting, diamond tool, friction material etc. carries out shaping handle after, obtain that bulk density is higher, good fluidity, iron powder that sphericity is high.
Summary of the invention
The objective of the invention is in order to solve the shape defect that powder granule exists in application process, a kind for the treatment of apparatus and method of improving powder characteristics, raising powder granule sphericity, reducing draw ratio is provided, the enforcement of this technology can not only be widened the approach that utilizes of powder material, increase operation rate, can also improve product properties.
The method of a kind of particle shaping that the present invention proposes, it is characterized in that: described method is by the subparticle orthopedic systems with powder granule, utilizing the mechanical shock polishing that powder granule is carried out shaping in trimmer handles, utilize grader to carry out classification then, obtain the product that different grain size distributes, it was divided into for two steps:
(1) shaping is handled: processed granular material enters the shaping processor by carrying of high velocity air, because the quick impact that blade rotates at a high speed, material is at first disperseed, constantly be subjected to simultaneously the effects such as mutual collision, friction and shearing between brute force impact, particle and the particle of rotor and high velocity air, irregular material shapes is constantly by regular, and the corner is trimmed, polishing, mellow and full; Sheet material is by constantly curling, closely knit, balling-up.Particle in irregular shape promptly was treated to sphere or was similar to spherical particle within a short period of time.
(2) material after the above-mentioned shaping processing is carried out classification, obtain varigrained product.
In above-mentioned particle shaping method, described powder granule mean particle size range distributes between 0～180 μ m, and described powder material comprises inorganic non-metallic mineral powder, metal-powder, organic polymer powder.
In above-mentioned particle shaping method, described impeller (sheet) rotating speed is 800～10000rpm, and the described shaping processing time is 3～20min; Protective atmosphere in the described trimmer is air, nitrogen, argon gas or helium.
The device of a kind of particle shaping method that the present invention proposes, it is characterized in that: described device contains stator 1, rotor 2, seal cover 3, sealing ring 4, chuck 5, cooling water inlet pipe 7, cooling water row mouthful pipe 8, blade 9, blade 10, feed(raw material)inlet 11, discharge gate 12, and described blade 9 is evenly distributed on rotor 2 and the seal cover 3 along circumference; Blade 10 on the described seal cover 3 is interspersed with the blade 9 on the rotor 2, does not bump against mutually; Between described seal cover 3 and the stator 1 high elastic rubber sealing ring 4 is housed, seal cover 3 one-sided opening the door are adopted clearance-type pan feeding and discharge.
In above-mentioned particle shaping device, described seal cover 3 is along even 8 blades that distribute of circumference.
In above-mentioned particle shaping device, 16 blades circumferentially on the described rotor 2 divide inside and outside two circles to arrange 8 blades of every circle.
The present invention utilizes mechanical shock to grind in trimmer powder granule is carried out the shaping processing by the subparticle orthopedic systems, utilizes grader to carry out classification then as requested, obtains the product that different grain size distributes.The hop count of product number, classification is decided the requirement of granularity according to the user.Processed powder material enters the shaping processor through carrying of high velocity air, in main frame because the quick impact of high speed rotor and blade, material is at first disperseed, constantly be subjected to simultaneously the effects such as mutual collision, friction and shearing between brute force impact, particle and the particle of rotor and high velocity air, irregular material shapes is constantly by regular, and the corner is trimmed, polishing, mellow and full; Sheet material is by constantly curling, closely knit, balling-up.Particle in irregular shape promptly was treated to sphere or was similar to spherical particle within a short period of time, and draw ratio is little, and the pine dress is big with tap density.Then the material after processed is carried out classification, obtain varigrained product, thereby realize the value added applications of different powder materials.
Description of drawings
Fig. 1 is a particle shaping machine schematic diagram of the present invention.
Fig. 2 is the electromicroscopic photograph before and after graphite shaping of the present invention is handled.
Fig. 3 is the electromicroscopic photograph before and after titanium valve of the present invention is handled.
Fig. 4 is the microphoto of the processing front and back before and after iron powder of the present invention is handled.
Fig. 5 is the electromicroscopic photograph before and after electrolytic copper powder of the present invention is handled.
Fig. 6 is an of the present invention shape particle shaping schematic diagram.
Fig. 7 is an of the present invention shape particle shaping schematic diagram.
The specific embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described further:
The out-of-shape powder granule is carried out shaping handle, preparation good sphericity, the material that draw ratio is little, particle size range is narrow comprise following steps:
The first step: shaping is handled
Utilize the particle shaping device,, selectively select for use air, nitrogen, argon gas or helium to make protection atmosphere according to the chemical property of powder material.The wheel speed of subparticle trimmer is set between 800～10000rpm scope, and the shaping processing time is in 3～20min.
Utilize powder characteristics tester analytical test powder material before and after shaping is handled, the situation of change of indexs such as the shape of material, dispersiveness, apparent density, tap density.In piece shape particle shaping process, starting stage is the grinding of grain corner, be adhesion and the fixation procedure of fine grained then on the coarse granule surface, granule is adsorbed on large particle surface and mainly occurs in initial a few minutes, firmly absorption mainly occurred in back a few minutes of shaping, and scholars such as Tanaka think mainly adsorbs with Van der Waals force and electrostatic attraction between the particle; In the shaping process of sheet-like particle, the starting stage is the bending of sheet-like particle, superimposed and balling-up, is the absorption and the compacting process of microparticle then.
As hydrogenation dehydrogenation titanium valve out-of-shape, mobile relatively poor, be unfavorable for being shaped and improving product properties.Under argon shield atmosphere, handle by shaping, investigated the influence of rotating speed and processing time to hydrogenation dehydrogenation titanium valve characteristic and product properties thereof.The result shows: the titanium valve particle after shaping is handled irregularly shapedly becomes subsphaeroidally by original, and the mobile performance of powder improves; The porosity that back titanium valve sintered sample is handled in shaping is 4.1%, and does not have defective such as micro-crack, obviously is better than the not microscopic structure of shaping titanium valve sintered sample; Simultaneously, the microhardness that back titanium valve sintered sample is handled in shaping obviously descends, and plasticity is improved.
To the shaping of piece shape particle, its principle as shown in Figure 6.
Grinding → mixing and absorption → fixedly embedded.
To the shaping of sheet material, its principle as shown in Figure 7.
Bending → balling-up → closely knit.
Second step: classification
The hop count of product number and classification is determined according to user and technological requirement, utilizes superfine classifier to carry out classification and handles, and obtains other spherical powder product of different grain size level.
As shown in Figure 1, main frame is made up of critical pieces such as stator 1, rotor 2 (linking to each other with main shaft 6), seal cover 3, sealing ring 4, chuck 5, cooling water inlet pipe 7, cooling water row mouthful pipe 8, blade 9, blade 10, feed(raw material)inlet 11, discharge gates 12.Seal cover upper edge circumference 8 blades that evenly distribute, 16 blades circumferentially on the rotor divide inside and outside two circles to arrange 8 blades of every circle.Blade on the seal cover and epitrochanterian blade are interspersed, and do not bump against mutually.The high elastic rubber sealing ring is housed between seal cover and the stator, prevents fine powder seepage, disperse, one-sided opening the door, system adopts clearance-type pan feeding and discharge.
Embodiment 1:
The crystalline flake graphite that Baotou, the Inner Mongol first graphite of crystalline substance Co., Ltd provides, carbon containing are formed by the pulverizing of impact type mechanical crusher more than 98%, and the D50 of product is 40～50 μ m.The operating condition of subparticle trimmer is: rotating speed is 4000rpm, and the processing time is respectively 10min and 15min.The draw ratio before the shaping is not 2.84, tap density 0.174g/cm
3, after the 10min shaping was handled, draw ratio was 1.91, has reduced 32.75%, tap density 0.275g/cm
3After the 15min surface modification, draw ratio is 1.45, has reduced by 48.94% nature, tap density 0.301g/cm
3
Embodiment 2:
The natural micro crystal graphite that the long-pending wealth graphite ore in Chenzhou, Hunan provides, purity 99%, particle diameter is less than 43 μ m (325 order).The operating condition of subparticle trimmer is: rotating speed is 3500rpm, and the processing time is respectively 5min and 10min.Draw ratio is not 2.53 before the shaping, tap density 0.861g/cm
3, after the 5min shaping was handled, draw ratio was 1.85, has reduced 26.88%, tap density 0.853g/cm
3After the 10min shaping was handled, draw ratio was 1.26, has reduced 50.20%, tap density 0.846g/cm
3Because of still containing some superfine graphite powder in the not classification sample after the micro crystal graphite shaping, cause tap density less than the density before the shaping not because of polishing off in the shaping process; With after wherein the superfine graphite powder removes, though apparent density changes not quite, tap density is from the preceding 0.861g/cm that is untreated by gas flow sizing machine
3Bring up to 0.931g/cm
3
Example 3
-400 order hydrogenation dehydrogenation (HDH) titanium valves of buying on the market, purity is more than 99%, and impurity contents such as Fe, Si, Cl, C, N, O, H are 0.75wt%, the middle particle diameter D of powder
50Be 18.47 μ m.The operating condition of subparticle trimmer is: rotating speed is respectively 3000rpm and 5000rpm, processing time 15min, and the powder overall characteristic situation of change of titanium valve sees Table 1 before and after handling.
Table 1 titanium valve powder overall characteristic change list
| The parameter numbering | Angle of repose | The spatula angle | Apparent density (g/cm 3) | Tap density (g/cm 3) | The degree of compression (%) | All spend together (μ m) | Slamp value |
| Ti-0-0 | 43.67 | 72.83 | 1.152 | 1.884 | 63.54 | 12.02 | 46 |
| Ti-3-15 | 34.34 | 62.25 | 1.645 | 2.159 | 31.25 | 6.80 | 64 |
| Ti-5-15 | 21.83 | 52.25 | 1.727 | 2.194 | 27.04 | 10.20 | 71 |
Example 4:
Huge prosperous 100 orders (the 150 μ m) reduced iron powder that Co., Ltd produces of making in Pingding County, Shanxi, purity is greater than 99%.The rotating speed of subparticle trimmer is 3500rpm, and apparent density, particle mean size, the sphericity situation of change of iron powder are as shown in table 3 before and after the shaping.
Powder characteristics situation of change before and after the shaping of table 3 reduced iron powder
| Experiment condition | Apparent density (g/cm 3) | Particle mean size | The particle sphericity |
| Reduced iron powder is untreated | 2.83 | 17.59 | 0.59 |
| Handle 5min | 3.38 | 14.18 | 0.73 |
| Handle 8min | 3.43 | 10.57 | 0.74 |
| Handle 12min | 3.47 | 9.86 | 0.76 |
| Handle 20min | 3.54 | 9.49 | 0.77 |
Example 5:
The electrolytic copper powder that has levigation end new material (Beijing) Co., Ltd to produce, purity is shallow rose-red dendroid more than 99.7%, and particle diameter is greater than+325 orders (less than 45 μ m).The operating condition of subparticle trimmer is: rotating speed is 5000rpm, and the processing time is 15min.After ball milling and shaping processing, variable density sees Table 2.
Variable density before and after the shaping of table 2 electrolytic copper powder
| Project | Original state (copper powder) | Behind the ball milling 1h | After shaping is handled again |
| Apparent density (g/cm 3) | 1.983 | 2.799 | 3.466 |
| Tap density (g/cm 3) | 2.521 | 3.985 | 4.893 |
Claims (6)
1. particle shaping method, it is characterized in that: described method is by the subparticle orthopedic systems with powder granule, utilizing the mechanical shock polishing that powder granule is carried out shaping in trimmer handles, utilize grader to carry out classification then, obtain the product that different grain size distributes, it was divided into for two steps:
(1) shaping is handled: processed granular material enters the shaping processor by carrying of high velocity air, because the quick impact that blade rotates at a high speed, material is at first disperseed, constantly be subjected to simultaneously the effects such as mutual collision, friction and shearing between brute force impact, particle and the particle of rotor and high velocity air, irregular material shapes is constantly by regular, and the corner is trimmed, polishing, mellow and full; Sheet material is by constantly curling, closely knit, balling-up.Particle in irregular shape promptly was treated to sphere or was similar to spherical particle within a short period of time.
(2) material after the above-mentioned shaping processing is carried out classification, obtain varigrained product.
2. according to the described a kind of particle shaping method of claim 1, it is characterized in that: described powder granule mean particle size range distributes between 0～180 μ m, and described powder material comprises inorganic non-metallic mineral powder, metal-powder, organic polymer powder.
3. according to the described a kind of particle shaping method of claim 1, described impeller (sheet) rotating speed is 800～10000rpm, and the described shaping processing time is 3～20min; Protective atmosphere in the described trimmer is air, nitrogen, argon gas or helium.
4. device of realizing particle shaping method as claimed in claim 1, it is characterized in that: described device contains stator (1), rotor (2), seal cover (3), sealing ring (4), chuck (5), cooling water inlet pipe (7), cooling water row mouthful pipe (8), a blade (9), blade (10), feed(raw material)inlet (11), discharge gate (12).Described blade (9) is evenly distributed on the rotor (2) along circumference, and blade (10) is evenly distributed on the seal cover (3) along circumference; Blade (9) on blade (10) on the described seal cover (3) and the rotor (2) is interspersed, and does not bump against mutually; Between described seal cover (3) and the stator (1) high elastic rubber sealing ring (4) is housed, one-sided the opening the door of seal cover (3) adopted clearance-type pan feeding and discharge.
5, according to the described particle shaping device of claim 4, it is characterized in that: described seal cover (3) is along even 8 blades that distribute of circumference.
6, according to the described particle shaping device of claim 4, it is characterized in that: 16 blades circumferentially on the described rotor (2), divide inside and outside two circles to arrange 8 blades of every circle.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101642814B (en) * | 2009-06-29 | 2011-01-05 | 金堆城钼业股份有限公司 | Preparation method of near spherical molybdenum powder |
| CN101973088A (en) * | 2010-09-03 | 2011-02-16 | 长兴清华粉体及新材料工程中心有限公司 | Preparation method of high liquidity rotational moulding raw material powder |
| CN104071775A (en) * | 2014-04-09 | 2014-10-01 | 岳梁彩 | Graphite shaping machine |
| CN105131842A (en) * | 2015-10-13 | 2015-12-09 | 郑州磨料磨具磨削研究所有限公司 | Shape dressing method for nanodiamond aggregate in polishing solution |
| CN107405685A (en) * | 2015-03-05 | 2017-11-28 | 东邦钛株式会社 | Titanium class powder and its ingot casting and sintered article |
| CN109622138A (en) * | 2018-11-16 | 2019-04-16 | 佛山市莫尔卡特种石材有限公司 | A kind of grinding shaper and its method for preparing spherical glass sand |
| CN110935394A (en) * | 2019-11-05 | 2020-03-31 | 南京清大迈特新材料有限公司 | Micro-nano powder fine processing method and device |
| CN111168557A (en) * | 2020-01-06 | 2020-05-19 | 深圳市华威环保建材有限公司 | Recycled aggregate shaping device |
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2006
- 2006-04-07 CN CN 200610011610 patent/CN1827301A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101642814B (en) * | 2009-06-29 | 2011-01-05 | 金堆城钼业股份有限公司 | Preparation method of near spherical molybdenum powder |
| CN101973088A (en) * | 2010-09-03 | 2011-02-16 | 长兴清华粉体及新材料工程中心有限公司 | Preparation method of high liquidity rotational moulding raw material powder |
| CN104071775A (en) * | 2014-04-09 | 2014-10-01 | 岳梁彩 | Graphite shaping machine |
| CN104071775B (en) * | 2014-04-09 | 2017-11-14 | 岳梁彩 | A kind of graphite trimmer |
| CN107405685A (en) * | 2015-03-05 | 2017-11-28 | 东邦钛株式会社 | Titanium class powder and its ingot casting and sintered article |
| CN105131842A (en) * | 2015-10-13 | 2015-12-09 | 郑州磨料磨具磨削研究所有限公司 | Shape dressing method for nanodiamond aggregate in polishing solution |
| CN105131842B (en) * | 2015-10-13 | 2018-03-09 | 郑州磨料磨具磨削研究所有限公司 | Nano diamond aggregate pattern dressing method in polishing fluid |
| CN109622138A (en) * | 2018-11-16 | 2019-04-16 | 佛山市莫尔卡特种石材有限公司 | A kind of grinding shaper and its method for preparing spherical glass sand |
| CN110935394A (en) * | 2019-11-05 | 2020-03-31 | 南京清大迈特新材料有限公司 | Micro-nano powder fine processing method and device |
| WO2021088098A1 (en) * | 2019-11-05 | 2021-05-14 | 南京清大迈特新材料有限公司 | Fine processing method and device for preparing micro/nano powder |
| CN110935394B (en) * | 2019-11-05 | 2021-07-30 | 南京清大迈特新材料有限公司 | Micro-nano powder fine processing method and device |
| CN111168557A (en) * | 2020-01-06 | 2020-05-19 | 深圳市华威环保建材有限公司 | Recycled aggregate shaping device |
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